noun, plural six·teen·mos.
Examples from the Web for sixteenmo
Other sizes occasionally used are called “sixteenmo” or “sextodecimo,” “eighteenmo” or “octodecimo,” etc.The Story of Books|Gertrude Burford Rawlings
British Dictionary definitions for sixteenmo
noun plural -mos
Word Origin and History for sixteenmo
"book printed on sheets of 16 leaves," 1847, from an English reading of the printers' Latin abbreviation 16-mo, representing sexto decimo "sixteen."